/*
 * Copyright 1999-2018 Alibaba Group Holding Ltd.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

(function (mod) {
    if (typeof exports == "object" && typeof module == "object") // CommonJS
        mod(require("../../lib/codemirror"));
    else if (typeof define == "function" && define.amd) // AMD
        define(["../../lib/codemirror"], mod);
    else // Plain browser env
        mod(CodeMirror);
})(function (CodeMirror) {
    "use strict";

    var htmlConfig = {
        autoSelfClosers: {
            'area': true, 'base': true, 'br': true, 'col': true, 'command': true,
            'embed': true, 'frame': true, 'hr': true, 'img': true, 'input': true,
            'keygen': true, 'link': true, 'meta': true, 'param': true, 'source': true,
            'track': true, 'wbr': true, 'menuitem': true
        },
        implicitlyClosed: {
            'dd': true, 'li': true, 'optgroup': true, 'option': true, 'p': true,
            'rp': true, 'rt': true, 'tbody': true, 'td': true, 'tfoot': true,
            'th': true, 'tr': true
        },
        contextGrabbers: {
            'dd': {'dd': true, 'dt': true},
            'dt': {'dd': true, 'dt': true},
            'li': {'li': true},
            'option': {'option': true, 'optgroup': true},
            'optgroup': {'optgroup': true},
            'p': {
                'address': true, 'article': true, 'aside': true, 'blockquote': true, 'dir': true,
                'div': true, 'dl': true, 'fieldset': true, 'footer': true, 'form': true,
                'h1': true, 'h2': true, 'h3': true, 'h4': true, 'h5': true, 'h6': true,
                'header': true, 'hgroup': true, 'hr': true, 'menu': true, 'nav': true, 'ol': true,
                'p': true, 'pre': true, 'section': true, 'table': true, 'ul': true
            },
            'rp': {'rp': true, 'rt': true},
            'rt': {'rp': true, 'rt': true},
            'tbody': {'tbody': true, 'tfoot': true},
            'td': {'td': true, 'th': true},
            'tfoot': {'tbody': true},
            'th': {'td': true, 'th': true},
            'thead': {'tbody': true, 'tfoot': true},
            'tr': {'tr': true}
        },
        doNotIndent: {"pre": true},
        allowUnquoted: true,
        allowMissing: true,
        caseFold: true
    }

    var xmlConfig = {
        autoSelfClosers: {},
        implicitlyClosed: {},
        contextGrabbers: {},
        doNotIndent: {},
        allowUnquoted: false,
        allowMissing: false,
        caseFold: false
    }

    CodeMirror.defineMode("xml", function (editorConf, config_) {
        var indentUnit = editorConf.indentUnit
        var config = {}
        var defaults = config_.htmlMode ? htmlConfig : xmlConfig
        for (var prop in defaults) config[prop] = defaults[prop]
        for (var prop in config_) config[prop] = config_[prop]

        // Return variables for tokenizers
        var type, setStyle;

        function inText(stream, state) {
            function chain(parser) {
                state.tokenize = parser;
                return parser(stream, state);
            }

            var ch = stream.next();
            if (ch == "<") {
                if (stream.eat("!")) {
                    if (stream.eat("[")) {
                        if (stream.match("CDATA[")) return chain(inBlock("atom", "]]>"));
                        else return null;
                    } else if (stream.match("--")) {
                        return chain(inBlock("comment", "-->"));
                    } else if (stream.match("DOCTYPE", true, true)) {
                        stream.eatWhile(/[\w\._\-]/);
                        return chain(doctype(1));
                    } else {
                        return null;
                    }
                } else if (stream.eat("?")) {
                    stream.eatWhile(/[\w\._\-]/);
                    state.tokenize = inBlock("meta", "?>");
                    return "meta";
                } else {
                    type = stream.eat("/") ? "closeTag" : "openTag";
                    state.tokenize = inTag;
                    return "tag bracket";
                }
            } else if (ch == "&") {
                var ok;
                if (stream.eat("#")) {
                    if (stream.eat("x")) {
                        ok = stream.eatWhile(/[a-fA-F\d]/) && stream.eat(";");
                    } else {
                        ok = stream.eatWhile(/[\d]/) && stream.eat(";");
                    }
                } else {
                    ok = stream.eatWhile(/[\w\.\-:]/) && stream.eat(";");
                }
                return ok ? "atom" : "error";
            } else {
                stream.eatWhile(/[^&<]/);
                return null;
            }
        }

        inText.isInText = true;

        function inTag(stream, state) {
            var ch = stream.next();
            if (ch == ">" || (ch == "/" && stream.eat(">"))) {
                state.tokenize = inText;
                type = ch == ">" ? "endTag" : "selfcloseTag";
                return "tag bracket";
            } else if (ch == "=") {
                type = "equals";
                return null;
            } else if (ch == "<") {
                state.tokenize = inText;
                state.state = baseState;
                state.tagName = state.tagStart = null;
                var next = state.tokenize(stream, state);
                return next ? next + " tag error" : "tag error";
            } else if (/[\'\"]/.test(ch)) {
                state.tokenize = inAttribute(ch);
                state.stringStartCol = stream.column();
                return state.tokenize(stream, state);
            } else {
                stream.match(/^[^\s\u00a0=<>\"\']*[^\s\u00a0=<>\"\'\/]/);
                return "word";
            }
        }

        function inAttribute(quote) {
            var closure = function (stream, state) {
                while (!stream.eol()) {
                    if (stream.next() == quote) {
                        state.tokenize = inTag;
                        break;
                    }
                }
                return "string";
            };
            closure.isInAttribute = true;
            return closure;
        }

        function inBlock(style, terminator) {
            return function (stream, state) {
                while (!stream.eol()) {
                    if (stream.match(terminator)) {
                        state.tokenize = inText;
                        break;
                    }
                    stream.next();
                }
                return style;
            };
        }

        function doctype(depth) {
            return function (stream, state) {
                var ch;
                while ((ch = stream.next()) != null) {
                    if (ch == "<") {
                        state.tokenize = doctype(depth + 1);
                        return state.tokenize(stream, state);
                    } else if (ch == ">") {
                        if (depth == 1) {
                            state.tokenize = inText;
                            break;
                        } else {
                            state.tokenize = doctype(depth - 1);
                            return state.tokenize(stream, state);
                        }
                    }
                }
                return "meta";
            };
        }

        function Context(state, tagName, startOfLine) {
            this.prev = state.context;
            this.tagName = tagName;
            this.indent = state.indented;
            this.startOfLine = startOfLine;
            if (config.doNotIndent.hasOwnProperty(tagName) || (state.context && state.context.noIndent))
                this.noIndent = true;
        }

        function popContext(state) {
            if (state.context) state.context = state.context.prev;
        }

        function maybePopContext(state, nextTagName) {
            var parentTagName;
            while (true) {
                if (!state.context) {
                    return;
                }
                parentTagName = state.context.tagName;
                if (!config.contextGrabbers.hasOwnProperty(parentTagName) ||
                    !config.contextGrabbers[parentTagName].hasOwnProperty(nextTagName)) {
                    return;
                }
                popContext(state);
            }
        }

        function baseState(type, stream, state) {
            if (type == "openTag") {
                state.tagStart = stream.column();
                return tagNameState;
            } else if (type == "closeTag") {
                return closeTagNameState;
            } else {
                return baseState;
            }
        }

        function tagNameState(type, stream, state) {
            if (type == "word") {
                state.tagName = stream.current();
                setStyle = "tag";
                return attrState;
            } else {
                setStyle = "error";
                return tagNameState;
            }
        }

        function closeTagNameState(type, stream, state) {
            if (type == "word") {
                var tagName = stream.current();
                if (state.context && state.context.tagName != tagName &&
                    config.implicitlyClosed.hasOwnProperty(state.context.tagName))
                    popContext(state);
                if ((state.context && state.context.tagName == tagName) || config.matchClosing === false) {
                    setStyle = "tag";
                    return closeState;
                } else {
                    setStyle = "tag error";
                    return closeStateErr;
                }
            } else {
                setStyle = "error";
                return closeStateErr;
            }
        }

        function closeState(type, _stream, state) {
            if (type != "endTag") {
                setStyle = "error";
                return closeState;
            }
            popContext(state);
            return baseState;
        }

        function closeStateErr(type, stream, state) {
            setStyle = "error";
            return closeState(type, stream, state);
        }

        function attrState(type, _stream, state) {
            if (type == "word") {
                setStyle = "attribute";
                return attrEqState;
            } else if (type == "endTag" || type == "selfcloseTag") {
                var tagName = state.tagName, tagStart = state.tagStart;
                state.tagName = state.tagStart = null;
                if (type == "selfcloseTag" ||
                    config.autoSelfClosers.hasOwnProperty(tagName)) {
                    maybePopContext(state, tagName);
                } else {
                    maybePopContext(state, tagName);
                    state.context = new Context(state, tagName, tagStart == state.indented);
                }
                return baseState;
            }
            setStyle = "error";
            return attrState;
        }

        function attrEqState(type, stream, state) {
            if (type == "equals") return attrValueState;
            if (!config.allowMissing) setStyle = "error";
            return attrState(type, stream, state);
        }

        function attrValueState(type, stream, state) {
            if (type == "string") return attrContinuedState;
            if (type == "word" && config.allowUnquoted) {
                setStyle = "string";
                return attrState;
            }
            setStyle = "error";
            return attrState(type, stream, state);
        }

        function attrContinuedState(type, stream, state) {
            if (type == "string") return attrContinuedState;
            return attrState(type, stream, state);
        }

        return {
            startState: function (baseIndent) {
                var state = {
                    tokenize: inText,
                    state: baseState,
                    indented: baseIndent || 0,
                    tagName: null, tagStart: null,
                    context: null
                }
                if (baseIndent != null) state.baseIndent = baseIndent
                return state
            },

            token: function (stream, state) {
                if (!state.tagName && stream.sol())
                    state.indented = stream.indentation();

                if (stream.eatSpace()) return null;
                type = null;
                var style = state.tokenize(stream, state);
                if ((style || type) && style != "comment") {
                    setStyle = null;
                    state.state = state.state(type || style, stream, state);
                    if (setStyle)
                        style = setStyle == "error" ? style + " error" : setStyle;
                }
                return style;
            },

            indent: function (state, textAfter, fullLine) {
                var context = state.context;
                // Indent multi-line strings (e.g. css).
                if (state.tokenize.isInAttribute) {
                    if (state.tagStart == state.indented)
                        return state.stringStartCol + 1;
                    else
                        return state.indented + indentUnit;
                }
                if (context && context.noIndent) return CodeMirror.Pass;
                if (state.tokenize != inTag && state.tokenize != inText)
                    return fullLine ? fullLine.match(/^(\s*)/)[0].length : 0;
                // Indent the starts of attribute names.
                if (state.tagName) {
                    if (config.multilineTagIndentPastTag !== false)
                        return state.tagStart + state.tagName.length + 2;
                    else
                        return state.tagStart + indentUnit * (config.multilineTagIndentFactor || 1);
                }
                if (config.alignCDATA && /<!\[CDATA\[/.test(textAfter)) return 0;
                var tagAfter = textAfter && /^<(\/)?([\w_:\.-]*)/.exec(textAfter);
                if (tagAfter && tagAfter[1]) { // Closing tag spotted
                    while (context) {
                        if (context.tagName == tagAfter[2]) {
                            context = context.prev;
                            break;
                        } else if (config.implicitlyClosed.hasOwnProperty(context.tagName)) {
                            context = context.prev;
                        } else {
                            break;
                        }
                    }
                } else if (tagAfter) { // Opening tag spotted
                    while (context) {
                        var grabbers = config.contextGrabbers[context.tagName];
                        if (grabbers && grabbers.hasOwnProperty(tagAfter[2]))
                            context = context.prev;
                        else
                            break;
                    }
                }
                while (context && context.prev && !context.startOfLine)
                    context = context.prev;
                if (context) return context.indent + indentUnit;
                else return state.baseIndent || 0;
            },

            electricInput: /<\/[\s\w:]+>$/,
            blockCommentStart: "<!--",
            blockCommentEnd: "-->",

            configuration: config.htmlMode ? "html" : "xml",
            helperType: config.htmlMode ? "html" : "xml",

            skipAttribute: function (state) {
                if (state.state == attrValueState)
                    state.state = attrState
            }
        };
    });

    CodeMirror.defineMIME("text/xml", "xml");
    CodeMirror.defineMIME("application/xml", "xml");
    if (!CodeMirror.mimeModes.hasOwnProperty("text/html"))
        CodeMirror.defineMIME("text/html", {name: "xml", htmlMode: true});

});
